Novel current amplitude differential protection criterion for line with unmeasurable branch in active distribution network

被引：0
|
作者：
Zhang X. [1 ]
Ma X. [2 ]
Zhang L. [1 ]
Wang Z. [2 ]
Lin X. [2 ]
Li Z. [2 ]
机构：
[1] Electric Power Research Institute of State Grid Zhejiang Electric Power Co., Ltd., Hangzhou
[2] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 02期
关键词：
Active distribution network; Current amplitude differential protection; Distributed power generation; Unmeasurable branch; Weak synchronous system;
D O I：
10.16081/j.epae.202001006
中图分类号：
学科分类号：
摘要：
The operation performance of current amplitude differential protection is affected by the unmeasu-rable branches and other practical engineering factors. For this reason, the characteristics of the amplitude difference of the currents on both sides of the active distribution network with unmeasurable branches under normal operation and different fault scenarios in and out of the area are analyzed. On this basis, a new type of current amplitude differential protection criterion is proposed by using the amplitude difference of the positive sequence component of the current on both sides of the protected line before and after the fault to constitute the braking amount and action amount respectively. Simulative results show that the proposed criterion can adapt to different unmeasurable branch access capacities. © 2020, Electric Power Automation Equipment Press. All right reserved.
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页码：76 / 81
页数：5
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